Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    5.317843E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-11-02T06:55:31+0800
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    1 Object 1

    AOE ID 51118
    NORAD ID 51118
    Object Type PAYLOAD
    Country
    US US
    ← VS →

    2 Object 2

    AOE ID 54752
    NORAD ID 54752
    Object Type PAYLOAD
    Country
    CN CN

    Conjunction Constraints

    Parameter STARLINK-3394 SHIYAN 21 (SY-21)
    Time of Closest Approach 2026-11-03T07:40:13+0000
    Collision Probability (Pc) 5.317843E-6
    Conjunction Distance (km) 1.111 km
    Relative Speed (km/s) 2.283 km/s
    Conjunction Risk Parameters R (Radial): 0.832 | I (In-track): -0.727 | C (Cross-track): 0.106
    Collision Risk Index (CRI) 0.5
    X Position (km) 1127.014 1126.636
    Position Y (km) -6746.459 -6747.352
    Position Z (km) -165.421 -165.96
    Velocity X (km/s) 4.538 6.117
    Velocity Y (km/s) 0.616 0.924
    Velocity Z (km/s) 6.11 4.491

    Orbital Parameters 国际轨道数据源

    Parameter STARLINK-3394 SHIYAN 21 (SY-21)
    Semimajor Axis (a) 6840.856 km 6858.983 km
    Eccentricity (e) 0.000128 0.002451
    Inclination (i) 53.1600° 35.9930°
    RAAN 290.2678° 293.2550°
    Perigee Argument 83.5363° 5.4272°
    Mean Anomaly (M) 276.5785° 354.6724°
    Apogee 463.594 km 497.655 km
    Perigee 461.844 km 464.037 km
    Orbit Epoch 2026-11-01T05:39:14+0000 2026-11-01T10:12:48+0000

    STARLINK-3394 & SHIYAN 21 (SY-21) Collision Probability (Pc) Trend

    STARLINK-3394 & SHIYAN 21 (SY-21) Collision Probability (Pc) TrendNot Available

    STARLINK-3394 & SHIYAN 21 (SY-21) Miss Distance (Miss Distance) Trend

    STARLINK-3394 & SHIYAN 21 (SY-21) Miss Distance (Miss Distance) TrendNot Available

    STARLINK-3394Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    SHIYAN 21 (SY-21)Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    STARLINK-3394Collision Probability Trend

    Object 1 Probability TrendNot Available

    SHIYAN 21 (SY-21)Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with STARLINK-3394

    No nearby objects data